处理期间引发 SSAS 表格模型超时

在对表格模型执行 Azure Analysis Service 模型的完整处理时，处理 10 分钟后出现以下错误：

Failed to save modifications to the server. Error returned: 'Microsoft SQL: Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.. The exception was raised by the IDbCommand interface.

Technical Details:
RootActivityId: cd0cfc78-416a-4039-a79f-ed7fe9836906
Date (UTC): 2/27/2018 1:25:58 PM
The command has been canceled.. The exception was raised by the IDbCommand interface.
The command has been canceled.. The exception was raised by the IDbCommand interface.
The command has been canceled.. The exception was raised by the IDbCommand interface.
The command has been canceled.. The exception was raised by the IDbCommand interface.

该模型的数据源是 Azure 数据仓库，SSAS 通过 SQL 身份验证对其进行身份验证。当发生超时时，某些分区已检索到所有行，但其他分区仍在处理。该模型包含 11 个表，每个表都有一个分区。

使用 Visual Studio 2015 和 SSMS 2017 进行处理时，我都收到错误。我看不到任何超时 10 分钟（600 秒）的 SSAS 服务器属性。单独的表处理可以在没有超时问题的情况下完成，因为它们都在 10 分钟内完成。

我尝试过设置timeout财产在dataSources.connectionDetails我的表格模型脚本语言 json 文件（即 Model.bim）中的对象。但是编辑它会删除身份验证凭据，然后重置凭据会删除timeout财产。所以我不知道该属性是否与超时错误问题相关。

我正在使用的分区查询表达式的示例：

let
    Source = #"SQL/resourcename database windows net;DatabaseName",
    MyQuery = 
    Value.NativeQuery(
        Source,
        "SELECT * FROM [dbo].[MyTable]"
    )
in
    MyQuery

因此，感谢 GregGalloway 的提示，我发现可以使用 Power Query M 语言在每个分区的基础上设置超时。

所以我的 TMSL 对象的数据访问部分现在看起来像这样......

The model.dataSource是这样的：

"dataSources": [
  {
    "type": "structured",
    "name": "MySource",
    "connectionDetails": {
      "protocol": "tds",
      "address": {
        "server": "serverName.database.windows.net",
        "database": "databaseName"
      },
      "authentication": null,
      "query": null
    },
    "options": {},
    "credential": {
      "AuthenticationKind": "UsernamePassword",
      "Username": "dbUsername",
      "EncryptConnection": true
    }
  }
]

各个分区查询如下（注意 CommandTimeout 参数）：

let
    Source = Sql.Database("serverName.database.windows.net","databaseName",[CommandTimeout=#duration(0, 2, 0, 0)]),
    MyQuery = 
    Value.NativeQuery(
        Source,
        "SELECT * FROM [dbo].[MyTable]"
    )
in
    MyQuery

因此，现在我明确为分区查询设置 2 小时的超时。